Features - Macrom 43 .05 Manuel D'emploi

• 3/2/1 CHANNEL OPERATION
The amplifier can be operated as a stereo or a as mono-bridged amplifier thus doubling the
output power independently from the input mode; the power can be subdivided as follows,
according to your needs:
a) 50/70/100 W RMS for each one of the two channels
b) 50/70/100 W RMS for two stereo channels, and 130/180/250 W RMS mono
c) 130/180/250 W RMS for one mono channel
• LOW-BOOST SELECTOR
This switch boosts the low frequencies from 0 to +3 or +6 dB per octave.
• RCA INPUT SENSITIVITY
The new amplifier has an input sensitivity set to 500 mV for optimum coupling with other
MACROM sources. However, it is possible to adjust the sensitivity between 100 mV and 2 V for
easy coupling of other sources available on the market.
• CHECK CONTROL INDICATOR
This LED shows the current state of the amplifier.
WHITE The unit is switched off.
GREEN The unit works perfectly well.
RED The unit is in the protection mode, something is wrong.
• OPTICAL GROUND DECOUPLING SYSTEM WITH FOURFOLD PROTECTION
Your unit is equipped with four different protection devices, as befits all high-end products.
These protections are fitted with an optical decoupling system for the separation of the input
ground from the output ground:
SOFT START: the amp powers gradually in order to avoid damage to the speakers in case the
head unit is switched on with the volume control set to maximum.
OVERHEATING: in case of wrong installation the unit enters the protection mode before being
damaged. As soon as the temperature returns to normal values, the unit resumes normal
operation.
OVERLOADS: in case a series of speakers is connected to the amplifier with the total
impedance value dropping below a tolerable level of 1-1.5 Ohm, the unit enters the protection
mode. In this event check the total impedance value of the system.
OUTPUT SHORT CIRCUIT: in case of a short circuit at the speaker outlets the unit enters the
protection mode in order to avoid serious damage to the end-stage transistors. Normal
operation is resumed on eliminating the short circuit.
• CLASS-A DRIVER CIRCUIT
• END STAGE WITH DISCRETE COMPONENTS (TRANSISTORS)
• PWM MOS-FET POWER SUPPLY
The great power of the 43.-series is obtained by means of a special stabilized C-Mos-Fet PWM
(Pulse width modulation) supply unit which offers a constant power supply from 11 to 15 V, high
efficiency with low current draw, high power stability to sudden voltage changes in your car's
electric system. The results are excellent performance, a linear and wide frequency response
with high dynamics.
• REMOTE ON AND OFF
On switching the head unit on or off, the amplifier is automatically switched on or off.
• CAPACITIVE/INDUCTIVE POWER SUPPLY FILTER
A special circuit assures low level of radio frequency interferences (RFI) and cuts off system
noises (i.e. the whine of the alternator).

FEATURES

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